﻿using System;
using System.Collections.Generic;
using System.Xml.Serialization;
using NewLife;
using NewLife.Data;
using XCode;
using XCode.Cache;

namespace AntJob.Data.Entity
{
    /// <summary>应用系统。数据作业隶属于某个应用</summary>
    public partial class App : EntityBase<App>
    {
        #region 对象操作
        static App()
        {
            // 累加字段
            var df = Meta.Factory.AdditionalFields;
            //df.Add(__.MessageCount);

            // 过滤器 UserModule、TimeModule、IPModule
            //Meta.Modules.Add<UserModule>();
            //Meta.Modules.Add<TimeModule>();
            //Meta.Modules.Add<IPModule>();

            // 单对象缓存
            var sc = Meta.SingleCache;
            sc.FindSlaveKeyMethod = k => Find(__.Name, k);
            sc.GetSlaveKeyMethod = e => e.Name;
        }

        /// <summary>验证数据，通过抛出异常的方式提示验证失败。</summary>
        /// <param name="isNew">是否插入</param>
        public override void Valid(Boolean isNew)
        {
            // 如果没有脏数据，则不需要进行任何处理
            if (!HasDirty) return;

            // 这里验证参数范围，建议抛出参数异常，指定参数名，前端用户界面可以捕获参数异常并聚焦到对应的参数输入框
            if (Name.IsNullOrEmpty()) throw new ArgumentNullException(nameof(Name), "名称不能为空！");

            if (!isNew && JobCount == 0 && !Dirtys[nameof(JobCount)]) JobCount = Job.FindCountByAppID(ID);
            if (!isNew && MessageCount == 0 && !Dirtys[nameof(MessageCount)]) MessageCount = AppMessage.FindCountByAppID(ID);
        }
        #endregion

        #region 扩展属性
        /// <summary>作业集合</summary>
        [XmlIgnore]
        public IList<Job> Jobs => Extends.Get(nameof(Jobs), k => Job.FindAllByAppID(ID));
        #endregion

        #region 扩展查询
        /// <summary>根据编号查找</summary>
        /// <param name="id">编号</param>
        /// <returns>实体对象</returns>
        public static App FindByID(Int32 id)
        {
            if (id <= 0) return null;

            // 单对象缓存
            return Meta.SingleCache[id];
        }

        /// <summary>根据名称查找</summary>
        /// <param name="name">名称</param>
        /// <returns>实体对象</returns>
        public static App FindByName(String name)
        {
            // 单对象缓存
            return Meta.SingleCache.GetItemWithSlaveKey(name) as App;
        }
        #endregion

        #region 高级查询
        /// <summary>高级查询</summary>
        /// <param name="category"></param>
        /// <param name="enable"></param>
        /// <param name="key"></param>
        /// <param name="p"></param>
        /// <returns></returns>
        public static IEnumerable<App> Search(String category, Boolean? enable, String key, PageParameter p)
        {
            var exp = new WhereExpression();

            if (enable != null) exp &= _.Enable == enable;
            if (!category.IsNullOrEmpty()) exp &= _.Category == category;

            if (!key.IsNullOrEmpty()) exp &= _.Name.Contains(key) | _.DisplayName.Contains(key);

            return FindAll(exp, p);
        }
        #endregion

        #region 业务操作
        /// <summary>分类单对象缓存</summary>
        static FieldCache<App> CategoryCache = new FieldCache<App>(__.Category);

        /// <summary>查询所有分类缓存</summary>
        /// <returns></returns>
        public static IDictionary<String, String> FindAllCategoryByCache() => CategoryCache.FindAllName();
        #endregion
    }
}